Question

question 5 of 10
99.9% of the matter that makes up living organisms consists of how many elements?
a. 6
b. 25
c. 90
d. 118

Explanation:

In biology, it is a well - known fact that about 99.9% of the matter in living organisms is composed of six elements: carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), and sulfur (S).

Answer:

A. 6